Helical modes in swirling Jets

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

The spiral form of vortex breakdown observed in the numerical simulations of Ruith et al. (2003) is interpreted as the consequence of the development of a so-called nonlinear global mode originating in the convective/absolute transition of the instability in the lee of the vortex breakdown bubble. This local theory gives an excellent prediction of the precession frequency measured in the threedimensional DNS.

Original languageEnglish
Title of host publicationIUTAM Symposium on Elementary Vortices and Coherent Structures
Subtitle of host publicationSignificance in Turbulence Dynamicsa
PublisherKluwer Academic Publishers
Pages265-271
Number of pages7
ISBN (Print)9781402041808
DOIs
Publication statusPublished - 1 Jan 2006

Publication series

NameFluid Mechanics and its Applications
Volume79
ISSN (Print)0926-5112

Keywords

  • Centrifugal instability
  • Helical modes
  • Vortices

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